<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise 关键问题 - 异常穿透</title>
</head>
<body>
    <script>
        let p = new Promise((resolve,reject)=>{
            setTimeout(()=>{
                resolve('ok');
            },1000);
        });
        
        p.then(value=>{
            // console.log(111);
            throw 'err';
        }).then(value=>{
            console.log(222);
        }).then(value=>{
            console.log(333)
        }).catch(reason=>{
            console.warn(reason);
        })
    </script>
    
</body>
</html>